Vulkaan Kilauea op Hawaii

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Hawaiian volcano might erupt in 24 hours after 250 quakes in short time
A Hawaiian volcano could be set to erupt after hundreds of earthquakes and the collapse of a crater floor.

Lava may burst through the ground east of Kilauea, the most active of the five volcanoes that form the state’s main island, geologists have warned.

Authorities urged the public to be on alert after scientists noted underground magma flowing beneath a main road near houses in the district of Puna.

More than 250 earthquakes have been detected since a crater floor collapsed at the Pu’u O’o vent in the shield volcano’s eastern rift zone earlier this week.

Most were minor but many were felt by locals, including one with a magnitude of 4.2, which shook the coast on Tuesday morning.

Scientists from the US Geological Survey’s Hawaiian Volcano Observatory (HVO) warned the seismic activity could lead to a lava breakout, although they could not say where or when.

“Magma has now migrated into a lower part of the east rift zone,” she said, adding there was concern that it was in a rift near Highway 130, a major road on the island.

There are homes in that area of Hawaii's Big Island and the road also leads to a popular access point where people can hike or bike into the lava viewing area.

The Hawaii County Civil Defence Agency issued an alert warning people in the area to monitor the situation and be prepared for the possibility of a new lava flow.

Spokeswoman Kanani Aton said the agency was “planning ahead for a worst-case scenario” by reviewing emergency plans and monitoring the activity.

Ms Babb said the activity has slowed significantly since a spike earlier this week but the threat level has not changed.

However, scientists are not sure if decreased seismic activity is an indication that the event is over or if it has just stalled before picking back up.

“That’s the unknown at this point," Ms Babb said. "Therefore we are still watching, we are watching very closely."

Geologists flew over the area in a helicopter and observed a layer of red ash covering the ground near the Pu’u O’o vent. The ash was spread throughout the area when the crater floor collapsed.

“The good news is that as they flew down the east rift zone they didn’t see any ground cracks or steaming that would suggest that the magma was coming near the surface,” Ms Babb said.

Most of Kilauea’s activity has been not been explosive, but an eruption in 1924 spewed ash and 10-tonne rocks into the sky, killing one man.

In 1983 an eruption of Pu’u Oo resulted in lava fountains soaring over 1,500 feet high. In the decades since, the lava flow has buried dozens of square miles of land and destroyed many homes.

In 2008, after a series of small earthquakes rattled the island, Kilauea’s summit crater opened and gushed lava and rock over 75 acres of the mountain, damaging a nearby viewing point

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Kilauea-vulkaan op Hawaï spuwt rook en lava
De Kilauea-vulkaan op Hawaï spuwt rook en lava. Voor het eerst sinds 2016 ligt er lava op de kraterbodem.

Kilauea In Hawaii OnGoing (Emergency Event) | Server 4 | VolcanoYT

Overflowing Lava Lake Recorded From Above Kilauea (Apr. 26, 2018)

Kilauea Volcano Earthquake Swarm Alert: Hawaii

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janinekrippner twitterde op woensdag 02-05-2018 om 16:01:53 Kilauea: "A new crack 1 km (0.6 mile) long was found on the west (uprift) side of Pu‘u ‘Ō‘ō during HVO's overflight"https://t.co/VBscoQsYl1 https://t.co/EWAtqpX12l reageer retweet

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Kilauea volcano: Residents along the East Rift Zone told to prepare to evacuate

Lower Puna officials in Hawaii are preparing for a possible eruption amid continuous earthquakes along the East Rift Zone of Kīlauea Volcano. The preparations include the identification of shelters, mobilization of police and other security personnel to ensure residents’ safety, and road crews to ensure access to evacuation routes.

"Should an eruption occur, residents along the East Rift Zone may have little warning and should be prepared to evacuate," said Civil Defense Administrator Talmadge Magno, adding that the County will keep the community informed about the situation.

"All agencies have been alerted about the possibility of an eruption," Magno said. "The risk areas and possible hazards are being identified, and shelters have been identified."

Recent observations
Elevated rates of seismicity and deformation at Kīlauea Volcano along a section of the lower East Rift Zone east of the Pu‘u ‘Ō‘ō vent continue, the Hawaiian Volcano Observatory (HVO) reported 05:23 UTC on Thursday, May 3, 2018.

This activity is associated with the continued intrusion of magma into the East Rift Zone to locations east of Highway 130 and an outbreak of lava from the lower East Rift Zone remains a possible outcome of the continued unrest, HVO warns. At this time it is not possible to say with certainty if or where such an outbreak may occur, but the area downrift (east) of Pu‘u ‘Ō‘ō remains the most likely location.

A GPS station located about 1.5 km (1 mile) southwest of Nanawale Estates began moving toward the north on Wednesday morning local time, indicating the magma intrusion is approaching this area of the East Rift Zone. The station has already moved several centimeters.

A tiltmeter at Pu‘u ‘Ō‘ō recorded steady, deflationary tilt during the day, with several sharp inflation offsets. These offsets probably recorded the continued episodic collapse of the crater floor. Some of these offsets corresponded to short-lived ashy plumes rising from the crater.

Tiltmeters at the summit began recording an increased deflationary tilt this afternoon. The summit lava lake level has lowered about 20 m (65 feet) since the deflationary tilt began in the early morning on May 1.

New small ground cracks less than a few cm (inches) wide developed yesterday across a couple of roads in and adjacent to Leilani Estates. These cracks reflect the buildup of stress at the surface due to the magma intrusion. No steam or gases were observed escaping from the cracks.

Analysis of webcam images of the 61g lava flow field on May 1 indicates that surface flows within a few kilometers of Pu‘u ‘Ō‘ō have stopped advancing - the few areas of incandescence visible in the images did not move starting early morning on May 1. The 61g flow is likely no longer being supplied with lava from Pu‘u ‘Ō‘ō.

Flyover Pu'u O'o: Huge Plume, Steaming Fissures (May 1, 2018)

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Kilauea volcano erupts near residential area
Mount Kilauea volcano has erupted near a residential area on Hawaii's largest island, prompting a local state of emergency and the mandatory evacuation of 1,700 local residents.

One witness said lava had burst across a road like a curtain of fire. He said he could smell sulphur and burning trees.

Community centres have been opened to provide shelter.

The eruption follows a series of strong earthquakes over recent days.

A volcanic crater vent - known as Puu Oo - collapsed earlier this week, sending lava down the mountain's slopes towards populated areas.

Officials had been warning residents all week they should be prepared to evacuate as an eruption would give little warning.

twitter:

ABC twitterde op vrijdag 04-05-2018 om 06:48:57 Lava can be seen spewing from a vent in Hawaii's Leilani Estates community on the Big Island after eruption of Kilauea volcano. https://t.co/DdDqlKmyV2The county has ordered evacuations for all of Leilani Estates, which according to the last Census has a population of 1,500. https://t.co/v8O2poQGPe reageer retweet

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Op maandag 7 mei 2018 08:05 schreef Eyjafjallajoekull het volgende:
Bewegend beeld:

Hawaii Volcano Eruption Update - Sunday Evening (May 6, 2018)

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Angst en beven: metershoge lavastroom in achtertuin bewoners Hawaii

HAWAII - Na de uitbarsting van de vulkaan Kilauea op Hawaii zijn zeker 21 woningen compleet verwoest. Er vielen geen gewonden. Vanuit een helikopter zijn spectaculaire beelden van de uitbarsting gemaakt. Te zien is hoe de lavastroom niets heel laat van (vakantie)woningen met zwembad.

Zo’n 1700 inwoners van het woongebied rond de vulkaan zochten eerder een veilig heenkomen. Ontheemde eilandbewoners kunnen terecht bij meerdere opvangcentra.

Vulkaanuitbarsting Hawaii: gebied geëvacueerd
Het gaat om huizen in de wijk Leilani Estates ten oosten van de berg op het grootste eiland van de archipel. Ook zijn tien scheuren ontstaan in het aardoppervlak waardoor lava ontsnapt.

Volgens het Amerikaanse seismologische dienst USGS begon de uitbarsting van Kilauea op 30 april. De uitbarsting ging gepaard met verschillende aardbevingen die beperkte schade veroorzaakten aan wegen op het eiland en voor korte stroomstoringen zorgden.

Schildvulkaan
De Amerikaanse staat Hawaii telt meerdere vulkanen en Kilauea is een van de meest actieve vulkanen ter wereld. Het gaat om een zogenoemde schildvulkaan. Als die uitbarst kan het lava niet alleen uit de krater stromen maar ook door ondergrondse scheuren op andere plaatsen aan de oppervlakte komen.

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Op maandag 7 mei 2018 12:51 schreef J.A.R.V.I.S. het volgende:

[..]

Er zijn dus 10 "uitbarstingen" als ik de kaart goed lees?

Frutsel, complimenten voor dit soort topics, of het nu orkanen of vulkanen zijn, klasse OP en info keer op keer.

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Kilauea volcano update: Eruption at east rift zone continues at moderate - low levels

Eruption of lava and gas continues at a low level along Kīlauea Volcano's lower East Rift Zone within the Leilani Estates subdivision. USGS reports that on Monday 7 May 2 new fissures opened up and temporarily erupted lava, making a total of 12 fissure segments that broke ground and were active since the start of the eruption in the Leilani Estates.

The longest lava flow thereby advanced about 0.9 km (0.6 miles) northward from fissure 8 before stopping. Large cracks have now also appeared on Highway 130 west of the eruption site and they continue to widen (up to 7 – 8 cm by now) and expel volcanic gasses and steam. Rates of seismicity and deformation changed little throughout the day and gas emissions likely remain elevated in the vicinity of fissures.

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During the afternoon, two more fissures opened along the lineament of the previous fissures in the Leilani Estates and erupted briefly. Fissure #13 erupted at 14:47 local time across Leilani Street near the intersection with Pohoiki Road and rem,ained active until about 17:00.
The fissure #14, located a bit to the SW, had apparently a similar activity.
Earthquakes continue, but have been decreasing in numbers and size over the past days.